--- a/Python/sysmodule.c	Wed Nov 06 19:03:11 2013 +0100
+++ b/Python/sysmodule.c	Wed Nov 06 22:36:40 2013 +0100
@@ -42,6 +42,16 @@
 #endif
 
 PyObject *
+_PySys_GetObjectId(_Py_Identifier *key)
+{
+    PyThreadState *tstate = PyThreadState_GET();
+    PyObject *sd = tstate->interp->sysdict;
+    if (sd == NULL)
+        return NULL;
+    return _PyDict_GetItemId(sd, key);
+}
+
+PyObject *
 PySys_GetObject(const char *name)
 {
     PyThreadState *tstate = PyThreadState_GET();
@@ -52,6 +62,21 @@
 }
 
 int
+_PySys_SetObjectId(_Py_Identifier *key, PyObject *v)
+{
+    PyThreadState *tstate = PyThreadState_GET();
+    PyObject *sd = tstate->interp->sysdict;
+    if (v == NULL) {
+        if (_PyDict_GetItemId(sd, key) == NULL)
+            return 0;
+        else
+            return _PyDict_DelItemId(sd, key);
+    }
+    else
+        return _PyDict_SetItemId(sd, key, v);
+}
+
+int
 PySys_SetObject(const char *name, PyObject *v)
 {
     PyThreadState *tstate = PyThreadState_GET();